Morphological knowledge involves understanding word structure and formation with a specific focus on morphemes, which are the basic components of meaning in a language. Proficiency in morphology enables individuals to identify, examine, and manipulate words, thereby expanding their lexicon and enhancing their comprehension abilities. In addition to the distinctive morphological features of a language, researchers must account for variables beyond the level of morphology, such as the modality of stimuli and/or the modality of response. This systematic review provides a comprehensive overview of morphological knowledge tasks as well as a discussion of their nature, the ways in which they compare to the unidimensional and multidimensional conceptualizations of morphology in Arabic, and their relationship to research on the representation of morphology in the mental lexicon in the context of Arabic.